Age Difference Calculator Online

Calculate the age difference between two dates or two people’s birth dates. See years, months, days and total days between them.

First date (e.g. birth date)

Second date (e.g. birth date)

Age difference calculator online

Find the age difference between two dates—for example between two people’s birth dates. Enter the first and second date to get the difference in years, months, days, and total days.

Related calculators

Age Calculator →Date Difference Calculator →Age Check Online →

Cite This Calculator

Reference this calculator on your website or in your work using the citation below:

HTML Citation Code:

<p>Calculator: <a href="https://onlinecalculator.co.uk/time/age-difference-calculator" target="_blank">Age Difference Calculator Online</a> - OnlineCalculator.co.uk</p>

APA Style Citation:

OnlineCalculator.co.uk. (2025). Age Difference Calculator Online. Retrieved from https://onlinecalculator.co.uk/time/age-difference-calculator

Note: This calculator is free to use and reference. No permission required for educational or commercial citation.